Solvated mesophase pitches

Details Solvated mesophase pitches Solvated mesophase pitches

1994-07-28

1996-07-23

Myers, Helane

Mineral oils: processes and products

Asphalts, tars, pitches and resins; making, treating and...

Chemical modification of asphalt, tar, pitch or resin

208 22, 208 39, 208 45, C10C 300

Patent

active

055386210

ABSTRACT:
This invention relates to low melting solvated mesophase pitches which are suitable for spinning into carbon fibers. The solvated mesophase pitches have a lower melting point than conventional mesophase pitch but remain substantially anisotropic. The solvated mesophase can be produced as an intermediate during solvent fractionation or supercritical solvent fractionation of mesogen-containing isotropic pitches. The process is enhanced through the ability to recover pseudomesogens with an increased average molecular weight which, in combination with the solvent content, provides a fusible mesophase capable of being spun directly into infusible oriented anisotropic carbon fibers.

REFERENCES:
patent: 4631181 (1986-12-01), Matsumoto et al.
patent: 4818612 (1989-04-01), Hara et al.
patent: 5032250 (1991-07-01), Romine et al.
patent: 5259947 (1993-11-01), Kalback et al.

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